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// Maria vector indexing expression -*- c++ -*-
#ifdef __GNUC__
# pragma implementation
#endif // __GNUC__
#include "VectorIndex.h"
#include "VectorType.h"
#include "VectorValue.h"
#include "Valuation.h"
#include "VariableDefinition.h"
#include "Printer.h"
/** @file VectorIndex.C
* Vector indexing operation
*/
/* Copyright 1999-2002 Marko Mkel (msmakela@tcs.hut.fi).
This file is part of MARIA, a reachability analyzer and model checker
for high-level Petri nets.
MARIA is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
MARIA is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
The GNU General Public License is often shipped with GNU software, and
is generally kept in a file called COPYING or LICENSE. If you do not
have a copy of the license, write to the Free Software Foundation,
59 Temple Place, Suite 330, Boston, MA 02111 USA. */
VectorIndex::VectorIndex (class Expression& vector,
class Expression& i) :
Expression (),
myVector (&vector), myIndex (&i)
{
assert (myVector && myVector->getType ());
assert (myVector->getType ()->getKind () == Type::tVector);
assert (myIndex && myIndex->getType ());
assert (myIndex->getType ()->isAssignable
(static_cast<const class VectorType*>(myVector->getType ())
->getIndexType ()));
assert (myVector->isBasic () && myIndex->isBasic ());
setType (static_cast<const class VectorType*>(myVector->getType ())
->getItemType ());
}
VectorIndex::~VectorIndex ()
{
myVector->destroy ();
myIndex->destroy ();
}
class Value*
VectorIndex::do_eval (const class Valuation& valuation) const
{
class Value* idx = myIndex->eval (valuation);
if (!idx)
return NULL;
const class Type& indexType =
static_cast<const class VectorType*>(myVector->getType ())
->getIndexType ();
assert (idx->getType ().isAssignable (indexType));
assert (indexType.isConstrained (*idx));
card_t i = indexType.convert (*idx);
assert (i < CARD_T_MAX && i < indexType.getNumValues ());
delete idx;
class Value* vector = myVector->eval (valuation);
if (!vector)
return NULL;
assert (&vector->getType () == myVector->getType ());
if (const class Value* v =
(*static_cast<class VectorValue*>(vector))[i]) {
class Value* w = v->copy ();
delete vector;
return w;
}
else {
assert (false);
delete vector;
return NULL;
}
}
class Expression*
VectorIndex::ground (const class Valuation& valuation,
class Transition* transition,
bool declare)
{
class Expression* vector = myVector->ground (valuation, transition, declare);
if (!vector) return NULL;
class Expression* i = myIndex->ground (valuation, transition, declare);
if (!i) { vector->destroy (); return NULL; }
assert (valuation.isOK ());
if (vector == myVector && i == myIndex) {
vector->destroy ();
i->destroy ();
return copy ();
}
else
return static_cast<class Expression*>
(new class VectorIndex (*vector, *i))->ground (valuation);
}
class Expression*
VectorIndex::substitute (class Substitution& substitution)
{
class Expression* vector = myVector->substitute (substitution);
class Expression* i = myIndex->substitute (substitution);
if (vector == myVector && i == myIndex) {
vector->destroy ();
i->destroy ();
return copy ();
}
else
return (new class VectorIndex (*vector, *i))->cse ();
}
bool
VectorIndex::depends (const class VariableSet& vars,
bool complement) const
{
return
myVector->depends (vars, complement) ||
myIndex->depends (vars, complement);
}
bool
VectorIndex::forVariables (bool (*operation)
(const class Expression&,void*),
void* data) const
{
return
myVector->forVariables (operation, data) &&
myIndex->forVariables (operation, data);
}
#ifdef EXPR_COMPILE
# include "CExpression.h"
# include "Constant.h"
void
VectorIndex::compile (class CExpression& cexpr,
unsigned indent,
const char* lvalue,
const class VariableSet* vars) const
{
char* vvalue = 0;
if (cexpr.getVariable (*myVector, vvalue))
myVector->compile (cexpr, indent, vvalue, vars);
char* ixconv = 0;
class StringBuffer& out = cexpr.getOut ();
if (myIndex->getKind () != Expression::eConstant) {
char* ixvalue = 0;
if (cexpr.getVariable (*myIndex, ixvalue))
myIndex->compile (cexpr, indent, ixvalue, vars);
if (cexpr.getConverted (*myIndex, ixconv))
myIndex->getType ()->compileConversion (out, indent,
ixvalue, ixconv, false);
delete[] ixvalue;
}
out.indent (indent);
out.append (lvalue);
out.append ("=");
out.append (vvalue);
out.append (".a[");
if (myIndex->getKind () == Expression::eConstant)
out.append (myIndex->getType ()->convert
(static_cast<const class Constant&>(*myIndex).getValue ()));
else
out.append (ixconv);
out.append ("];\n");
delete[] vvalue;
delete[] ixconv;
}
#endif // EXPR_COMPILE
void
VectorIndex::display (const class Printer& printer) const
{
myVector->display (printer);
printer.delimiter ('[')++;
myIndex->display (printer);
--printer.delimiter (']');
}
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